參數(shù)資料
型號(hào): μPD4265400
廠商: NEC Corp.
英文描述: 64 M-Bit Dynamic RAM(64M 動(dòng)態(tài)RAM)
中文描述: 64 m位動(dòng)態(tài)隨機(jī)存儲(chǔ)器(RAM的6400動(dòng)態(tài))
文件頁(yè)數(shù): 9/28頁(yè)
文件大?。?/td> 256K
代理商: ΜPD4265400
μ
PD4264400, 4265400
9
Common to Read, Write, Read Modify Write Cycle
Parameter
Symbol
t
RAC
= 50 ns
t
RAC
= 60 ns
Unit
Notes
MIN.
MAX.
MIN.
MAX.
Read / Write cycle time
t
RC
90
110
ns
RAS precharge time
t
RP
30
40
ns
CAS precharge time
t
CPN
8
10
ns
RAS pulse width
t
RAS
50
10,000
60
10,000
ns
CAS pulse width
t
CAS
13
10,000
15
10,000
ns
RAS hold time
t
RSH
13
15
ns
CAS hold time
t
CSH
50
60
ns
RAS to CAS delay time
t
RCD
18
37
20
45
ns
1
RAS to column address delay time
t
RAD
13
25
15
30
ns
1
CAS to RAS precharge time
t
CRP
5
5
ns
2
Row address setup time
t
ASR
0
0
ns
Row address hold time
t
RAH
8
10
ns
Column address setup time
t
ASC
0
0
ns
Column address hold time
t
CAH
13
15
ns
OE lead time referenced to RAS
t
OES
0
0
ns
CAS to data setup time
t
CLZ
0
0
ns
OE to data setup time
t
OLZ
0
0
ns
OE to data delay time
t
OED
10
13
ns
Transition time (rise and fall)
t
T
3
50
3
50
ns
Refresh time
t
REF
64
64
ms
AC Characteristics
(Recommended Operating Conditions unless otherwise noted)
AC Characteristics Test Conditions
(1) Input timing specification
(2) Output timing specification
V
IH (MIN.)
= 2.0 V
V
IL (MAX.)
= 0.8 V
V
OH (MIN.)
= 2.0 V
V
OL (MAX.)
= 0.8 V
t
T
= 5 ns
t
T
= 5 ns
(3) Output load condition
V
CC
1,180
870
100 pF
C
L
I/O
#
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